Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 9/20 of 21/90?"
920 × 2190 is 21200.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/20×21/90 9/20×42/90 9/40×21/90 27/20×21/90 9/20×63/90 9/60×21/90 45/20×21/90 63/20×21/90
© everydaycalculation.com